Flame link doesn't last as long as it should (not line of sight breaking) - 631 480 442

Hello, Im playing with a friend and we noticed that his flame link randomly doesn't last as long as it should.

This happens in hideout so it's not a line of sight breaking issue.

It should last 12.72 seconds according to tooltip, but for some reason, it will sometimes break after 8 seconds and will sometimes last the full duration.

It is socketed in a corrupted hand of phreacia and is linked to more duration.

We tried socketing it in different items but same thing, sometimes it lasts full duration, sometimes it breaks early.